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प्रश्न
Write the main difference between an acid and a base.
उत्तर
| Acid-Base | Base |
| 1. Turns blue litmus red | 1. Turns red litmus blue |
| 2. Sour in taste | 2. Bitter in taste |
| 3. Release H+ ion in water | 3. Release OH- ion in water |
| 4. pH is less than 7 | 4. pH is more than 7 |
| 5. Example: HCI | 5. Example: NaOH |
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संबंधित प्रश्न
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?
red cabbage extract
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be:
(a) 4 mL
(b) 8 mL
(c) 12 mL
(d) 16 mL
What is common in all the water soluble bases (or alkalis)?
What is meant by strong bases and weak bases? Classify the following into strong bases and weak bases:
NH4OH, Ca(OH)2, NaOH, KOH, Mg(OH)2
Choose the correct option from given alternative:
When a small amount of acid is added to water, the phenomena which occur are:
(A) Dilution
(B) Neutralization
(C) Formation of H3O+ ions
(D) Salt formation
Vinay observed that the stain of curry on a white shirt becomes reddish-brown when soap is scrubbed on it, but it turns yellow again when the shirt is washed with plenty of water. What might be the reason for his observation?
- Soap is acidic in nature
- Soap is basic in nature
- Turmeric is a natural indicator which gives reddish tinge in bases
- Turmeric is a natural indicator which gives reddish tinge in acids
In which of the following setups would the bulb glow?
Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for the removal of hardness of water and a gas C is evolved. The gas C when passed through lime water, turns it milky. Identify A, B and C.
- A compound 'A' with a molecular formula of \[\ce{C2H4O2}\] reacts with a base to give salt and water. Identify 'A', state its nature and the name of the functional group it possesses. Write chemical equation for the reaction involved.
- When the above stated compound 'A' reacts with another compound 'B' having molecular formula \[\ce{C2H6O}\] in the presence of an acid, a sweet smelling compound is 'C' formed.
- Identify 'B' and 'C'.
- State the role of acid in this reaction.
- Write chemical equation for the reaction involved.
